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Finding the Fourth Proportional to 489,705.48, 675,859.50 and 274,857.30

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Solution

The fourth proportional to 489,705.48, 675,859.50 and 274,857.30 is: 379,340.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,705.48 : 675,859.50 = 274,857.30 : x
  2. Step 2: Convert to fraction form
    489,705.48/675,859.50 = 274,857.30/x
  3. Step 3: Cross multiply
    489,705.48x = 675,859.50 × 274,857.30
  4. Step 4: Simplify right side
    489,705.48x = 185,764,917,349.35
  5. Step 5: Solve for x
    x = 185,764,917,349.35/489,705.48
  6. Step 6: Final answer
    x = 379,340.08

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.